Abstract: How to effectively utilize the existing business processes is crucial to the study on workshop production management. Introducing the ontology into the workshop business process management, the framework and representation of process knowledge were discussed. A meta-model of workshop operation was developed ontologically through analyzing the workshop process model, then the meta-model was described in formalized representation to develop an ontological workshop model with the process flow as the center. For the business process of a particular job in workshop, it was represented by the ontological modeling language OWL, thus verifying if the ontological workshop model is adaptable to the representation and shareability of the knowledge of workshop process. The result showed that this method can conveniently implement the ontological representation of the existing business processes in workshop.